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Apple Display Connector
ADC monitor connector
Type
analog/digital video connector + USB
Production history
Designer
Apple Computer
Designed
1998
Manufacturer
Apple Computer
Superseded
DB-15
Superseded by
DVI (June 2004)
General specifications
Hot pluggable
Yes
External
Yes
Pins
35
Electrical
Max. voltage
25 V
Max. current
4.0 A
Pinout
Receptacle (at host)
Pin 1
25 V Supply
power
Pin 2
25 V Supply
power
Pin 3
LED
data
Pin 4
TMDS Data0–
data
Pin 5
TMDS Data0+
data
Pin 6
TMDS Data0/5 Shield
data
Pin 7
TMDS Data5–
data
Pin 8
TMDS Data5+
data
Pin 9
DDC Data
data
Pin 10
Vsync
data
Pin 11
25 V Return
power
Pin 12
25 V Return
power
Pin 13
Soft Power
power
Pin 14
TMDS Data1–
data
Pin 15
TMDS Data1+
data
Pin 16
TMDS Data1/3 Shield
data
Pin 17
TMDS Data3–
data
Pin 18
TMDS Data3+
data
Pin 19
DDC CLock
data
Pin 20
Clock Return
data
Pin 21
USB Data+
data
Pin 22
USB Data–
data
Pin 23
USB Return
data
Pin 24
TMDS Data2–
data
Pin 25
TMDS Data2+
data
Pin 26
TMDS Data2/4 Shield
data
Pin 27
TMDS Data4–
data
Pin 28
TMDS Data4+
data
Pin 29
Clock+
data
Pin 30
Clock-
data
C1
data
Analog Blue Video
C2
data
Analog Green Video
C3
data
Analog Horizontal Sync
C4
data
Analog Red Video
C5
data
Analog RGB Return and DDC Return
The Apple Display Connector (ADC) is a display and data connector developed by Apple, Inc. as a proprietary modification of the DVI connector. ADC combines analog and digital video signals, USB, and power all in one cable. It was used in later versions of the Apple Studio Display, including the final 17" CRT model, and most versions of the widescreen Apple Cinema Display, after which Apple adopted standard DVI connectors on later models.
ADC was first implemented in the July 2000 Power Mac G4 and G4 Cube, but disappeared from displays when Apple introduced the aluminum-clad 20" (51 cm), 23" (58 cm), and 30" (76 cm) Apple Cinema Displays in June 2004, which feature separate DVI, USB and FireWire connectors, and their own power supplies. An ADC port was still included with the Power Mac G5 until April 2005, when new models meant the only remaining Apple product with an ADC interface was the single processor Power Mac G5 introduced in October 2004. This single processor Power Mac G5 was discontinued soon after in June 2005.
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